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You want your children to be taller and yourself to be leaner, fitter, and sexually more active? You need growth hormone every night, if you listen to siren voices. Adam Bullmore, the director of “Too Big Too Soon,” did a good job balancing the loonier assertions (the BBC trailer called them “compelling anecdotal evidence”) with the consumer view represented by the American consumer activist, Jeremy Rifkin. It was a pity not to report the randomised double blind placebo controlled trials of growth hormone, but that's not a story.

Growth hormone has been with us in supplies limited only by cost for nearly 10 years and it is looking for a market; it …